Water quality detection sensor

Abstract

The utility model provides a water quality detection sensor which is characterized by comprising a shell, a first supporting part, a second supporting part, a light-emitting unit, a receiving unit, a circuit board, a reflecting unit and a pressing plate, the first supporting part and the second supporting part extend upwards along the top of the shell, and the first supporting part is provided with a first containing cavity; the light-emitting unit and the receiving unit are respectively connected to the circuit board and are accommodated in the first accommodating cavity; the reflection unit is arranged on the side face, opposite to the first supporting part, of the second supporting part. The side face, opposite to the second supporting part, of the first supporting part is provided with a first window, and the first window is provided with a transparent piece. Wherein the transparent part is made of polytetrafluoroethylene or a modified material thereof; wherein the pressing plate is pressed on the transparent part, is fixed on the first supporting part, and is used for fixing the transparent part. Therefore, it can be ensured that the water quality detection sensor is kept clean during working, and meanwhile the water quality detection sensor has good sealing performance and reliability.

Description

Technical Field

[0001] The utility model relates to the field of water quality detection, in particular to a water quality detection sensor. Background Art

[0002] With the development of modern industry, the use of chemical substances in people's production and life is increasing. When chemical substances are discharged into industrial water, domestic sewage or water for emergencies, it will cause sudden changes in water quality and seriously damage the water quality ecological environment. Therefore, timely and effective monitoring of sudden changes in water quality is an urgent and important need, which can help protect water flows and then help to manage and improve the ecological environment.

[0003] Water quality testing equipment is usually placed underwater to test water quality all day long. When the water quality testing equipment is submerged in water, a large amount of microorganisms or silt and other impurities will adhere to the surface through which the testing light of the water quality testing equipment passes. When there are a lot of microorganisms or silt and other impurities, they can block the light of the water quality testing equipment, thereby affecting the measurement accuracy of the water quality testing equipment. On the other hand, considering that the water quality testing equipment is placed in water, its sealing and reliability need to be ensured.

[0004] Therefore, how to solve the cleaning of water quality testing equipment and the corresponding sealing and reliability has become an urgent problem to be solved. Utility Model Content

[0005] A major advantage of the utility model is that it provides a water quality detection sensor, wherein the light-transmitting window of the water quality detection sensor is made of polytetrafluoroethylene material, which can effectively realize self-cleaning and prevent the window from being dirty and affecting the measurement accuracy.

[0006] A major advantage of the utility model is that it provides a water quality detection sensor. By improving the structure of the water quality detection sensor, the cleaning problem of the water quality detection sensor can be solved while ensuring the sealing and reliability of the entire water quality detection sensor.

[0007] A major advantage of the present invention is that it provides a water quality detection sensor, and fixes the components of the water quality detection sensor by means of a buckle structure, thereby ensuring the sealing and improving the reliability.

[0008] The utility model provides a water quality detection sensor, which is characterized by comprising

[0009] a housing, a first supporting portion and a second supporting portion extending upwardly from the top of the housing, a light emitting unit, a receiving unit, a circuit board, a reflecting unit, and a pressing plate.

[0010] Wherein, the first support portion has a first receiving cavity, the light-emitting unit and the receiving unit are respectively connected to the circuit board and received in the first receiving cavity; the reflection unit is disposed on the side surface of the second support portion relative to the first support portion.

[0011] Wherein, a first window is provided on the side surface of the first support portion relative to the second support portion, and a transparent member is provided on the first window.

[0012] Wherein, the transparent member is made of polytetrafluoroethylene or its modified material.

[0013] Wherein, the pressing plate is pressed against the transparent member and fixed to the first support portion to fix the transparent member.

[0014] A water quality detection sensor according to an embodiment of the present invention, characterized in that the water quality detection sensor further includes a main control module, and the main control module is electrically connected to the light-emitting unit and the receiving unit.

[0015] A water quality detection sensor according to an embodiment of the present invention, wherein the reflection unit is made of polytetrafluoroethylene or its modified material.

[0016] A water quality detection sensor according to an embodiment of the present invention, wherein the water quality detection sensor includes at least one sealing member, and the sealing member is disposed between the transparent member and the first support portion, and / or between the transparent member and the pressing plate.

[0017] A water quality detection sensor according to an embodiment of the present invention, wherein the second support portion is detachably fixed to the housing.

[0018] A water quality detection sensor according to an embodiment of the present invention, wherein the second support portion is fixed to the housing by a snap structure or a threaded connection.

[0019] A water quality detection sensor according to an embodiment of the present invention, wherein the pressing plate is fixed to the first support portion by a snap structure.

[0020] A water quality detection sensor according to an embodiment of the present invention, wherein the light-emitting unit emits optical signals of multiple bands; or, the light-emitting unit emits optical signals of a specific band.

[0021] A water quality detection sensor according to an embodiment of the present invention, wherein the receiving unit includes a photosensing chip, and the photosensing chip is implemented as one of a CMOS chip, a CCD chip, and a spectral chip.

[0022] A water quality detection sensor according to an embodiment of the present utility model, wherein the circuit board includes a first circuit board and a second circuit board, and the light emitting unit and the receiving unit are respectively connected to the first circuit board and the second circuit board.

[0023] Through the understanding of the subsequent description and the drawings, the further objectives and advantages of the present utility model will be fully embodied.

[0024] These and other objectives, features and advantages of the present utility model are fully embodied through the following detailed description and the drawings. Description of the Drawings

[0025] Figure 1 is a three-dimensional schematic diagram of a water quality detection sensor according to the first preferred embodiment of the present utility model.

[0026] Figure 2 is a front view schematic diagram of a water quality detection sensor according to the first preferred embodiment of the present utility model.

[0027] Figure 3 is a schematic cross-sectional view along the A-A direction of the front view of a water quality detection sensor according to the first preferred embodiment of the present utility model.

[0028] Figure 4 is a side view schematic diagram of a water quality detection sensor according to the first preferred embodiment of the present utility model.

[0029] Figure 5 is a schematic cross-sectional view along the B-B direction of the side view of a water quality detection sensor according to the first preferred embodiment of the present utility model. Detailed Embodiment

[0030] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, variant schemes, improvement schemes, equivalent schemes, and other technical schemes that do not deviate from the spirit and scope of the present utility model.

[0031] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0032] It will be understood that the term "a" should be construed as "at least one" or "one or more". That is, in one embodiment, the number of an element may be one, while in other embodiments, the number of the element may be multiple. The term "a" should not be construed as a limitation on the number.

[0033] Referring to the accompanying drawings of the present application Figures 1 to 5 As shown, a water quality detection sensor according to a first preferred embodiment of the present application is described hereinafter. The water quality detection sensor includes a housing 10, a first support portion 20 and a second support portion 30 extending upward along the top of the housing, a light emitting unit 40, a receiving unit 50, a circuit board 80, a reflection unit 90, and a main control module. The first support portion 20 and the second support portion 30 are oppositely arranged to form a detection channel 60. The first support portion 20 has a first receiving cavity 21, and the first receiving cavity 21 communicates with the corresponding cavity of the housing 10. The light emitting unit 40 and the receiving unit 50 are respectively disposed on the circuit board 80. That is, after the light emitting unit 40 and the receiving unit 50 are electrically connected to the circuit board 80, they are assembled inside the first receiving cavity 21 of the first support portion 20. The reflection unit 90 is fixed to the side surface of the second support portion 30 opposite to the first support portion 20. During detection, the fluid to be detected flows through the detection channel 60. The light emitting unit 40 emits light, which passes through the fluid to be detected in the detection channel 60, reaches the reflection unit 90 of the second support portion 30 to generate diffuse transmission (or reflection), and then is received by the receiving unit 50 to obtain spectral information. After analyzing the spectral information, the detection of the fluid is realized. In the present utility model, although the fluid detection mainly takes water quality detection as an example, it can be understood that the detection of fluids such as liquids and gases also falls within the protection scope of the present utility model.

[0034] Furthermore, a first window 22 is provided on the side of the first support portion 20 opposite to the second support portion 30. After the light-emitting unit 40 emits light, the light enters the detection channel 60 through the first window 22, and then undergoes diffuse transmission through the reflection unit 90 of the second support portion 30, and is received by the receiving unit 50 after passing through the first window 22 again. It can be understood that the first window 22 and the reflection unit 90 are disposed opposite to each other. It should be noted that in the detection of water quality or gas, the sensor needs to be placed in a liquid or gas. In order to prevent the fluid to be detected from entering the accommodation cavity, the window needs to be sealed. In the prior art, quartz glass is generally provided on the window. However, in a long-term detection environment, dirt is likely to adhere to the surface of the quartz glass, and it is not convenient to clean, which easily affects the test results. In view of this, the present utility model provides a transparent member 70 made of polytetrafluoroethylene material or its modified material (which can be Teflon material, for example, fluorinated ethylene propylene resin, perfluoroalkoxy resin; hereinafter, polytetrafluoroethylene is used as an example for illustration, but it can be understood that the modified material also falls within the scope) at the first window 22. That is, in order to avoid dirt affecting the detection result, the present utility model provides a transparent member made of polytetrafluoroethylene at the window. Since polytetrafluoroethylene is a high molecular polymer composed entirely of carbon and fluorine, it has anti-dirt ability, and therefore no dirt will adhere to the surface during use. It should be noted that the transparent member 70 should be hermetically fixed to the first window 22 of the first support portion 20, and the transparent member is made of polytetrafluoroethylene. Optionally, to ensure that no fluid to be detected enters the first accommodation cavity 21 during the detection process, for example, the transparent member can be adhered to the first support portion by an adhesive, or can be fixed to the first support portion by welding or other means. In individual embodiments, the transparent member can also be integrally formed on the first support portion 20. The light-emitting unit 40 and the receiving unit 50 are both disposed opposite to the first window 22, and the light-emitting unit 40 and the receiving unit 50 can be arranged vertically or horizontally and fixed to the circuit board 80.

[0035] Meanwhile, to further achieve the cleaning function, preferably, in the present utility model, the reflection unit 90 provided on the second support portion 30 is also made of polytetrafluoroethylene or its modified material. That is, the reflection unit 90 is formed by polytetrafluoroethylene, and then the reflection unit 90 is fixed to the second support portion 30, for example, by gluing, receiving in a receiving cavity, or fixing with a snap or other mechanical structure, or it can also be integrally formed. For example, while forming the second support portion 30, the reflection unit 90 is fixed to the side of the second support portion 30. The examples are not limited. For example, the second support portion 30 is formed by an injection molding process. The reflection unit 90 can be preset in the mold in advance during the injection molding process, and then the molten raw material is injected, cooled, and separated through processes such as pressurization, injection, and cooling to complete the injection molding. When forming the second support portion 30, the reflection unit 90 is fixed to the second support portion 30.

[0036] However, since the transparent member 70 is made of polytetrafluoroethylene or its modified material, it is difficult to be adhesively fixed by an adhesive, for example, it is difficult to be fixed by glue, so the reliability is poor, it is easy to fall off, and there are problems such as poor sealing. In this regard, preferably, the water quality detection sensor further includes a pressing plate 100, and the pressing plate 100 is fixed to the first support portion 20. Specifically, the transparent member 70 made of polytetrafluoroethylene is placed in the first window 22 of the first support portion 20 (preferably, the first window 22 of the first support portion 20 has a receiving groove, and the transparent member 70 is disposed in the receiving groove), and the pressing plate 100 presses on the transparent member 70 so that the transparent member 70 is fixed in the first window 22, and then the pressing plate 100 is fixed to the first support portion 20 through gluing, snap structures, etc. The pressing plate 100 has a light-transmitting window corresponding to the first window 22 to prevent the transparent member 70 from being blocked. The pressing plate 100 can be fixed to the first support portion 20 by an adhesive or by a snap structure. Preferably, in this embodiment, the pressing plate 100 is fixed to the first support portion 20 by a snap structure, thereby fixing the transparent member 70 in the first window 22.

[0037] Further, the water quality detection sensor further includes at least one seal, and at least one of the seals is disposed between the transparent member 70 and the first support portion 20 (preferably, in the case of having a receiving groove, placed in the receiving groove), and / or is disposed between the transparent member 70 and the pressing plate 100, thereby improving the sealing performance. For example, there may be two seals, and the seals are placed between the transparent member 70 and the first support portion 20. When the pressing plate 100 is pressed against the transparent member 70, the transparent member 70 is pressed against the seals, so that there is no gap between the transparent member 70 and the first support portion 20, ensuring the sealing performance. In another embodiment, the two seals are respectively disposed between the transparent member 70 and the first support portion 20 and between the transparent member 70 and the pressing plate 100 to ensure the sealing performance.

[0038] Furthermore, for better assembly, especially when the pressing plate 100 is fixed to the first support portion 20 by a snap structure, the second support portion 30 is preferably fixedly attached to the housing 10 in a split manner, that is, the second support portion 30 is fixed to the housing through structures such as bonding, threading, and snapping. Preferably, the second support portion 30 is fixedly attached to the housing 10 by a detachable threading or snap structure. That is, after the pressing plate 100 is fixed to the first support portion 20, the second support portion 30 is then fixed to the housing.

[0039] Among them, the light emitting unit 40 can emit optical signal of multiple bands, or can also emit optical signal of a specific band only, for example, only emit optical signal of the ultraviolet band. That is, different fluids may have different detection requirements, so the types of the corresponding light emitting units 40 are different. Further, the light emitting unit 40 includes a light source, and the light source is electrically connected and disposed on the circuit board 80.

[0040] The receiving unit 50 includes a photosensing chip, and the photosensing chip is attached to the circuit board 80. The photosensing chip can be implemented as a CMOS chip, a CCD chip, a spectral chip, etc.

[0041] The main control module is electrically connected to the light emitting unit 40 and the receiving unit 50. The main control module is used to control the light emitting unit 40 to generate an optical signal, and receive and process the optical band attenuation signal sent by the receiving unit 50. Preferably, the main control module is disposed inside the cavity of the housing 10, for example, can be fixed to the circuit board 80. In an individual embodiment, the main control module can also be separately disposed outside and work through cloud control, etc.

[0042] Among them, the light-emitting unit 40 can emit optical signals of multiple bands. After passing through the fluid to be detected, the optical signals will have corresponding signal attenuation. The receiving unit 50 is used to receive the attenuated signals after passing through the fluid to be detected. Preferably, the wavelength range of the optical signals is 200 nm to 1200 nm, that is, it covers the ultraviolet, visible light, and infrared bands.

[0043] In an individual embodiment, the light-emitting unit 40 can also project an optical signal of a specific band. At this time, the receiving unit 50 only receives the attenuated signal of a single band passing through the fluid to be detected.

[0044] Taking the emission of an optical signal in the ultraviolet band as an example in this embodiment, the light-emitting unit 40 includes an ultraviolet light source, and the receiving unit 50 includes a photosensing chip that can receive optical signals in the ultraviolet band.

[0045] When the water quality detection sensor is immersed in the water to be detected and is in the detection state, the ultraviolet light source emits ultraviolet light. The ultraviolet light passes through the transparent member made of polytetrafluoroethylene, passes through the fluid to be detected, reaches the reflection unit of the second support portion, generates diffuse transmission, and then passes through the transparent member made of polytetrafluoroethylene. The ultraviolet light will be attenuated and is received by the photosensing chip that can receive optical signals in the ultraviolet band. Then, through the data analysis module of the water quality detection sensor, the numerical values of the ultraviolet light intensity value emitted by the ultraviolet light source and the ultraviolet light intensity value received by the photosensing chip are analyzed to calculate the water quality condition of the water to be detected. Among them, the data analysis module is electrically connected to the main control module.

[0046] In the present utility model, the circuit board can be implemented as common circuit boards such as flexible boards, rigid boards, rigid-flex boards, and ceramic substrates.

[0047] In another variant embodiment of the present utility model, the light-emitting unit and the receiving unit can be respectively disposed on a first circuit board and a second circuit board, that is, the circuit board includes a first circuit board and a second circuit board.

[0048] Those skilled in the art should understand that the embodiments of the present utility model described above and shown in the drawings are only examples and do not limit the present utility model. The object of the present utility model has been completely and effectively achieved. The functions and structural principles of the present utility model have been shown and described in the embodiments. Without departing from the above principles, the embodiments of the present utility model can have any deformation or modification.

Claims

1. A water quality detection sensor, characterized in that: include a housing, a first supporting portion and a second supporting portion extending upwardly from the top of the housing, a light emitting unit, a receiving unit, a circuit board, a reflecting unit, and a pressing plate. The first supporting part has a first receiving cavity, the light emitting unit and the receiving unit are respectively connected to the circuit board and received in the first receiving cavity; the reflecting unit is arranged on a side of the second supporting part relative to the first supporting part; Wherein, a first window is provided on a side of the first supporting portion relative to the second supporting portion, and a transparent member is provided on the first window; Wherein, the transparent part is made of polytetrafluoroethylene or its modified material; Wherein, the pressing plate is pressed on the transparent member and fixed on the first supporting portion to fix the transparent member.

2. The water quality detection sensor according to claim 1, characterized in that: The water quality detection sensor further includes a main control module, and the main control module is electrically connected to the light emitting unit and the receiving unit.

3. The water quality detection sensor according to claim 1 or 2, wherein: The reflection unit is made of polytetrafluoroethylene or its modified material.

4. The water quality detection sensor according to claim 3, wherein: The water quality detection sensor includes at least one sealing member, and the sealing member is arranged between the transparent member and the first supporting portion, and / or between the transparent member and the pressing plate.

5. The water quality detection sensor according to claim 3, wherein: The second supporting portion is detachably fixed to the housing.

6. The water quality detection sensor according to claim 5, wherein: The second supporting portion is fixed to the housing through a snap-fit ​​structure or a threaded connection.

7. The water quality detection sensor according to claim 1, wherein: The pressing plate is fixed to the first supporting portion through a buckle structure.

8. The water quality detection sensor according to claim 1, wherein: The light emitting unit emits light signals of multiple wavelength bands; or, the light emitting unit emits light signals of a specific wavelength band.

9. The water quality detection sensor according to claim 1, wherein: The receiving unit includes a photosensitive chip, and the photosensitive chip is implemented as one of a CMOS chip, a CCD chip, and a spectral chip.

10. The water quality detection sensor according to claim 1, wherein: The circuit board includes a first circuit board and a second circuit board, and the light emitting unit and the receiving unit are connected to the first circuit board and the second circuit board respectively.

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